DB-01 front hex's

[Hog]

In between finishing my last race on Wednesday evening, and checking over my car today, one of the front hex's has snapped in half and is binding up the drive to that wheel.

1. Anyone know where I can get some replacements?
2. Why on earth didn't Tamiya go for the more common 12mm hex favouring a tine 10mm version? Does seem like a poor deisgn as the hex's are hardly "robust".

Cheers,
Dave.